What's wrong with my RCBS scale?

I picked up the same scale at Chilliwack. I can zero it, but the adjusting leg is is extended almost as far as it can go. There is also something that rattles around in the pan. If I removed some shot from the pan, could I lower the adjusting leg or does it work the other way around. I cleaned the bearings and looked at them with a microscope and they look fine.
 
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